1 /**************************************************************************
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
29 #include "main/imports.h"
30 #include "main/mipmap.h"
31 #include "main/teximage.h"
33 #include "pipe/p_context.h"
34 #include "pipe/p_defines.h"
35 #include "util/u_inlines.h"
36 #include "util/u_format.h"
37 #include "util/u_gen_mipmap.h"
40 #include "st_context.h"
41 #include "st_texture.h"
42 #include "st_gen_mipmap.h"
43 #include "st_cb_texture.h"
47 * one-time init for generate mipmap
48 * XXX Note: there may be other times we need no-op/simple state like this.
49 * In that case, some code refactoring would be good.
52 st_init_generate_mipmap(struct st_context
*st
)
54 st
->gen_mipmap
= util_create_gen_mipmap(st
->pipe
, st
->cso_context
);
59 st_destroy_generate_mipmap(struct st_context
*st
)
61 util_destroy_gen_mipmap(st
->gen_mipmap
);
62 st
->gen_mipmap
= NULL
;
67 * Generate mipmap levels using hardware rendering.
68 * \return TRUE if successful, FALSE if not possible
71 st_render_mipmap(struct st_context
*st
,
73 struct st_texture_object
*stObj
,
74 uint baseLevel
, uint lastLevel
)
76 struct pipe_context
*pipe
= st
->pipe
;
77 struct pipe_screen
*screen
= pipe
->screen
;
78 struct pipe_sampler_view
*psv
= st_get_texture_sampler_view(stObj
, pipe
);
79 const uint face
= _mesa_tex_target_to_face(target
);
81 assert(psv
->texture
== stObj
->pt
);
83 assert(target
!= GL_TEXTURE_3D
); /* implemented but untested */
86 /* check if we can render in the texture's format */
87 /* XXX should probably kill this and always use util_gen_mipmap
88 since this implements a sw fallback as well */
89 if (!screen
->is_format_supported(screen
, psv
->format
, psv
->texture
->target
,
90 0, PIPE_BIND_RENDER_TARGET
)) {
94 /* Disable conditional rendering. */
95 if (st
->render_condition
) {
96 pipe
->render_condition(pipe
, NULL
, 0);
99 util_gen_mipmap(st
->gen_mipmap
, psv
, face
, baseLevel
, lastLevel
,
100 PIPE_TEX_FILTER_LINEAR
);
102 if (st
->render_condition
) {
103 pipe
->render_condition(pipe
, st
->render_condition
, st
->condition_mode
);
110 * Compute the expected number of mipmap levels in the texture given
111 * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
112 * GL_TEXTURE_MAX_LEVEL settings. This will tell us how many mipmap
113 * levels should be generated.
116 compute_num_levels(struct gl_context
*ctx
,
117 struct gl_texture_object
*texObj
,
120 if (target
== GL_TEXTURE_RECTANGLE_ARB
) {
124 const struct gl_texture_image
*baseImage
=
125 _mesa_get_tex_image(ctx
, texObj
, target
, texObj
->BaseLevel
);
126 GLuint size
, numLevels
;
128 size
= MAX2(baseImage
->Width2
, baseImage
->Height2
);
129 size
= MAX2(size
, baseImage
->Depth2
);
131 numLevels
= texObj
->BaseLevel
;
138 numLevels
= MIN2(numLevels
, texObj
->MaxLevel
+ 1);
140 assert(numLevels
>= 1);
148 * Called via ctx->Driver.GenerateMipmap().
151 st_generate_mipmap(struct gl_context
*ctx
, GLenum target
,
152 struct gl_texture_object
*texObj
)
154 struct st_context
*st
= st_context(ctx
);
155 struct st_texture_object
*stObj
= st_texture_object(texObj
);
156 struct pipe_resource
*pt
= st_get_texobj_resource(texObj
);
157 const uint baseLevel
= texObj
->BaseLevel
;
164 /* not sure if this ultimately actually should work,
165 but we're not supporting multisampled textures yet. */
166 assert(pt
->nr_samples
< 2);
168 /* find expected last mipmap level to generate*/
169 lastLevel
= compute_num_levels(ctx
, texObj
, target
) - 1;
174 /* The texture isn't in a "complete" state yet so set the expected
175 * lastLevel here, since it won't get done in st_finalize_texture().
177 stObj
->lastLevel
= lastLevel
;
179 if (pt
->last_level
< lastLevel
) {
180 /* The current gallium texture doesn't have space for all the
181 * mipmap levels we need to generate. So allocate a new texture.
183 struct pipe_resource
*oldTex
= stObj
->pt
;
185 /* create new texture with space for more levels */
186 stObj
->pt
= st_texture_create(st
,
196 /* This will copy the old texture's base image into the new texture
197 * which we just allocated.
199 st_finalize_texture(ctx
, st
->pipe
, texObj
);
201 /* release the old tex (will likely be freed too) */
202 pipe_resource_reference(&oldTex
, NULL
);
203 pipe_sampler_view_reference(&stObj
->sampler_view
, NULL
);
206 /* Make sure that the base texture image data is present in the
209 st_finalize_texture(ctx
, st
->pipe
, texObj
);
214 assert(pt
->last_level
>= lastLevel
);
216 /* Try to generate the mipmap by rendering/texturing. If that fails,
217 * use the software fallback.
219 if (!st_render_mipmap(st
, target
, stObj
, baseLevel
, lastLevel
)) {
220 /* since the util code actually also has a fallback, should
221 probably make it never fail and kill this */
222 _mesa_generate_mipmap(ctx
, target
, texObj
);
225 /* Fill in the Mesa gl_texture_image fields */
226 for (dstLevel
= baseLevel
+ 1; dstLevel
<= lastLevel
; dstLevel
++) {
227 const uint srcLevel
= dstLevel
- 1;
228 const struct gl_texture_image
*srcImage
229 = _mesa_get_tex_image(ctx
, texObj
, target
, srcLevel
);
230 struct gl_texture_image
*dstImage
;
231 struct st_texture_image
*stImage
;
232 uint dstWidth
= u_minify(pt
->width0
, dstLevel
);
233 uint dstHeight
= u_minify(pt
->height0
, dstLevel
);
234 uint dstDepth
= u_minify(pt
->depth0
, dstLevel
);
235 uint border
= srcImage
->Border
;
237 dstImage
= _mesa_get_tex_image(ctx
, texObj
, target
, dstLevel
);
239 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
243 /* Free old image data */
244 ctx
->Driver
.FreeTextureImageBuffer(ctx
, dstImage
);
246 /* initialize new image */
247 _mesa_init_teximage_fields(ctx
, target
, dstImage
, dstWidth
, dstHeight
,
248 dstDepth
, border
, srcImage
->InternalFormat
,
249 srcImage
->TexFormat
);
251 stImage
= st_texture_image(dstImage
);
253 pipe_resource_reference(&stImage
->pt
, pt
);